Alloy



ATENT OFFICE DANIEL OHARA. DANIEL W. E/LDREDGE, AND JOHN LOGAN, 0FWALTHAM,

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ALtoY.

SPECIFICATION forming part of Letters Patent No. 385,952, dated July 10,1888.

Appliczition tiled March l, 1888, Serial No. 265.932. (No specimens.)

To all whom it may concern:

Be it known that we, DANIEL QHARA, DAN- IEL W. ELDREDGE,3.l1dJOHN LOGAN,of Waltham, in the county of Middlesex and State of hlussuchusetts, haveinvented certain new and useful Improvements in Alloys, of which thefollowing is a specification.

Our invention has for its object to provide an alloy or compound metalwhich shall he practically non-magnetic, inoxidiznble, and will have asuitable coefiicient of expansion to adopt it for use as the materialfor one of the parts of the rim of a compensationbalance for watches orchronomcters.

Our improved alloy consists of a compound of platinum, nickel, copper,and gold in about the following proportions: platinum, fifty (50) parts;nickel, twenty (20) parts; copper, from five (5) to forty (40) parts;gold, ten (10) parts.

\Ve do not limit ourselves to the exact pr0- portions of platinum,nickel, and gold above.

two subserihi no; witnesses, this 28th day of February, A. 1). 1888.

DANIEL OHARA. DANIEL \V. ELDREDGE. JOHN LOGAN.

\Vitncsscs:

HENRY N. Flsnnn, 'llnwnnn A. Muzsn.

ten parts of gold, as

